Tunneling-induced Talbot effect

Abstract We investigate the reforming of a plane wave into a periodic waveform in its propagation through a structural asymmetry four-level quantum dot molecule (QDM) system that is induced by an inter-dot tunneling process and present the resulting tunneling-induced Talbot effect. The tunneling pro...

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Autores principales:	Babak Azizi, Zahra Amini Sabegh, Mohammad Mahmoudi, Saifollah Rasouli
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ff9eb893eacc4833a4acfa24cebd85b6
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spelling	oai:doaj.org-article:ff9eb893eacc4833a4acfa24cebd85b62021-12-02T17:04:35ZTunneling-induced Talbot effect10.1038/s41598-021-86289-w2045-2322https://doaj.org/article/ff9eb893eacc4833a4acfa24cebd85b62021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86289-whttps://doaj.org/toc/2045-2322Abstract We investigate the reforming of a plane wave into a periodic waveform in its propagation through a structural asymmetry four-level quantum dot molecule (QDM) system that is induced by an inter-dot tunneling process and present the resulting tunneling-induced Talbot effect. The tunneling process between two neighborhood dots is provided with the aid of a gate voltage. Using a periodic coupling field the response of the medium to the propagating plane probe beam becomes periodic. The needed periodic coupling field is generated with the interference of two coherent plane waves having a small angle and propagating almost parallel to the probe beam direction. In the presence of the tunneling effect of an electron between two adjacent QDs, for the probe beam propagating through the QDM system, the medium becomes transparent where the coupling fields interfere constructively. As a result, the spatial periodicity of the coupling field modulates the passing plane probe beam. We determine the minimum length of the QDM system to generate a periodic intensity profile with a visibility value equal to 1 for the probe field at the exit plane of the medium. It is also shown that by increasing the propagation length of the probe beam through the QDM medium, the profile of the maximum intensity areas becomes sharper. This feature is quantified by considering a sharpness factor for the intensity profile of the probe beam at the transverse plane. Finally, we investigate free space propagation of the induced periodic field and present the Talbot images of the tunneling-induced periodic patterns at different propagation distances for different values of the QDM medium lengths. The presented dynamically designing method of the periodic coherent intensity patterns might find applications in science and technology. For instance, in optical lithography, the need to use micro/nanofabricated physical transmission diffraction gratings, in which preparation of them is expensive and time-consuming, can be eliminated.Babak AziziZahra Amini SabeghMohammad MahmoudiSaifollah RasouliNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Babak Azizi Zahra Amini Sabegh Mohammad Mahmoudi Saifollah Rasouli Tunneling-induced Talbot effect
description	Abstract We investigate the reforming of a plane wave into a periodic waveform in its propagation through a structural asymmetry four-level quantum dot molecule (QDM) system that is induced by an inter-dot tunneling process and present the resulting tunneling-induced Talbot effect. The tunneling process between two neighborhood dots is provided with the aid of a gate voltage. Using a periodic coupling field the response of the medium to the propagating plane probe beam becomes periodic. The needed periodic coupling field is generated with the interference of two coherent plane waves having a small angle and propagating almost parallel to the probe beam direction. In the presence of the tunneling effect of an electron between two adjacent QDs, for the probe beam propagating through the QDM system, the medium becomes transparent where the coupling fields interfere constructively. As a result, the spatial periodicity of the coupling field modulates the passing plane probe beam. We determine the minimum length of the QDM system to generate a periodic intensity profile with a visibility value equal to 1 for the probe field at the exit plane of the medium. It is also shown that by increasing the propagation length of the probe beam through the QDM medium, the profile of the maximum intensity areas becomes sharper. This feature is quantified by considering a sharpness factor for the intensity profile of the probe beam at the transverse plane. Finally, we investigate free space propagation of the induced periodic field and present the Talbot images of the tunneling-induced periodic patterns at different propagation distances for different values of the QDM medium lengths. The presented dynamically designing method of the periodic coherent intensity patterns might find applications in science and technology. For instance, in optical lithography, the need to use micro/nanofabricated physical transmission diffraction gratings, in which preparation of them is expensive and time-consuming, can be eliminated.
format	article
author	Babak Azizi Zahra Amini Sabegh Mohammad Mahmoudi Saifollah Rasouli
author_facet	Babak Azizi Zahra Amini Sabegh Mohammad Mahmoudi Saifollah Rasouli
author_sort	Babak Azizi
title	Tunneling-induced Talbot effect
title_short	Tunneling-induced Talbot effect
title_full	Tunneling-induced Talbot effect
title_fullStr	Tunneling-induced Talbot effect
title_full_unstemmed	Tunneling-induced Talbot effect
title_sort	tunneling-induced talbot effect
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/ff9eb893eacc4833a4acfa24cebd85b6
work_keys_str_mv	AT babakazizi tunnelinginducedtalboteffect AT zahraaminisabegh tunnelinginducedtalboteffect AT mohammadmahmoudi tunnelinginducedtalboteffect AT saifollahrasouli tunnelinginducedtalboteffect
_version_	1718381887590760448

Tunneling-induced Talbot effect

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